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Install the binary files provided by Oracle
- Download JDK 8 from Oracle WebSite. [jdk-8u65-macosx-x64.dmg for Mac].
- Double click on jdk-8u65-macosx-x64.dmg and follow the screen instructions.
- Once the JDK package is installed check the below output
- Verify JDK version
- Set the JAVA_HOME in your .bash_profile or .zshrc(If you are using Zshell)
- If the above path creates an issue while using maven, please replace the
JAVA_HOME
with the below path
Jdk installation
- Check if any older version exists on the machine. If exists uninstall it.
- Goto Java SE download site @ http://www.oracle.com/technetwork/java/javase/downloads/index.html.
- Run the downloaded installer (e.g., 'jdk-8u{xx}-windows-x64.exe'), which installs both the JDK and JRE.
- By default, the JDK will be installed in directory 'C:Program FilesJavajdk1.8.0_xx', where xx denotes the upgrade number; and JRE in 'C:Program FilesJavajre1.8.0_xx'.
Configure environment variables
Verify JDK installation
- Open command prompt (Start > in serach bar > type cmd.exe)
- Issue 'path' command to list the contents of the PATH environment variable. Check to make sure that your <JAVA_HOME>bin is listed in the PATH.Don't type prompt>, which denotes the command prompt!!! Key in the command (highlighted) only.
- Issue the following commands to verify that JDK/JRE are properly installed and display their version:
Write hello world program
- Create a directory to keep your works, e.g., 'd:myProject', or 'c:myProject', or any directory of your choice. Do NOT save your works in 'Desktop' or 'Documents' as they are hard to locate. The directory name shall not contain blank or special characters. Use meaningful but short name as it is easier to type.
- Launch a programming text editor (such as TextPad, or NotePad++, or Sublime Text, or Atom). Begin with a new file and enter the following source code. Save the file as 'Hello.java', under your work directory (e.g., d:myProject).
Compile and Run hello world program
To compile the source code 'Hello.java':
- Start a CMD Shell (Click the 'Start' button ⇒ 'run...' ⇒ Enter 'cmd').
- Set the Current Drive to the drive where you saved your source file 'Hello.java'. For example, suppose that your source file is saved in drive 'd', enter 'd:' as follow:
- Navigate to d:myProject folder
- Type dir
- Invoke the JDK compiler 'javac' to compile the source code 'Hello.java'.
- The output of the compilation is a Java class called 'Hello.class'. Issue a dir (List Directory) command again to check for the output.
- To run the program, invoke the Java Runtime 'java':
This article shows you how to install Java on Mac OSX, and also how to do Java/JDK version switching.
Tested with
- Mac OS 10.15.3
- JDK 8, 9, 10, 11, 12, 13 (AdoptOpenJDK)
Note
On Mac OSX, Java should installed in this folder; it is Mac’s standard.
On Mac OSX, Java should installed in this folder; it is Mac’s standard.
We will show you two ways to install Java JDK on Mac, via the popular Homebrew package manager and manually installation.
1. Homebrew
1.1 Install Homebrew and update it.
1.2 Add adoptopenjdk/openjdk.
1.3 Find all available JDK.
The output may vary.
1.4 Java 8, 9, 10, 11, 12, 13, choose one to install.
This example will install Java 8 and 11 for testing.
1.5 Where Java is installed?
/usr/libexec/java_home -V
Homebrew will install the JDK at folder
/Library/Java/JavaVirtualMachines/
, and this folder is Mac’s standard folder for Java installs.1.6 Test it, by default, Mac takes the highest version.
1.7 How to do version switching? Refer to below 3. version switching
2. Manual installation
The example shows you how to download the early access JDK 14 and install it on Mac OSX.
Steps
- Download JDK.
- Puts the JDK folder at
/Library/Java/JavaVirtualMachines
. - Export
JAVA_HOME
.
2.1 Download the early access JDK 14 from the OpenJDK website.
2.2 Extracts tar file to
/Library/Java/JavaVirtualMachines
2.3 Export
JAVA_HOME
.Find out where is JDK 14.
Create or edit the existing
~/.bash_profile
with a text editor.Export
JAVA_HOME
, save and exit.~/.bash_profile
Reflect the changes
2.4 Test it.
3. Version Switching
In this tutorial, we installed the Java 8 and Java 11 via
Homebrew
(Step 1), and Java 14 manually (Step 2), so this Mac has three versions now. And the Mac is using the JDK 14.Note
There are tools like jEnv to manage the Java version switching, but I prefer to manage with
There are tools like jEnv to manage the Java version switching, but I prefer to manage with
export JAVA_HOME
manually, it’s simple and easy to understand, no black box magic.3.1 Create or edit the existing
~/.bash_profile
with a text editor like vim or nano, export JAVA_HOME
to the specified JDK we want to use on Mac.The above changes will make
JAVA_HOME
point to JAVA 8.3.2 Reflect the changes.
Download Jdk For Macbook
Done.
If we want to switch JDK version again, update the
~/.bash_profile
and export JAVA_HOME
to other JDK version.References
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